Machine for manufacturing filter ribbon



Feb. 7, 1933. P. B. RENFREW MACHINE FOR MANUFACTURING FILTER RIBBON Filed Nov. 5, 1928 3 Sheets-Sheet l MACHINE FOR MANUFACTURING FILTER RIBBON Filed Nov. 5, 1928 3 Sheets-Sheet 2 QM M.

Feb. 7, 1933. P, B RENFREw 1,896,122

MACHINE FOR MANUFACTURING FILTER RIBBON Filed Nov. 5, 1928 5 Sheets-Sheet 3 my invention; 7

Fig.2 is an end elevation of the machine v Patented eb. 7,1933

- UNITED STATE r-ATENr OFFICE 1 PAUL B. R N'FYRE or roar wants, INDIANA, AssIGNoR To s. 1r. BOWSER .& confirm, q mo, orron'r AYNE, INDIANA,:ACORPORAT1ON OF INDIANA) MACHINE Fan MANUFACTURING FILTER nnanoiw r Application fled November 5, 192a. swarm; 317,343.

1 Myinvention relates'to apparatus for in-.

denting or embossing metal ribbon which is particularly adapted for a porous laminated I filter. for'useiin the purification of oils, al- 5 though the apparatus may have a general'application. The object of my invention isthe provision of an improved and eflicient machine for more accurately *producing spaced-apart transverse channels in ribbon laminations for W'POIOUS lamina ted filter, the ribbon; having spaced ribs toprovide-passages between the entrance and discharge sides of the filter. 0 Another object of the invention is the provision of mechanismin a machine for forming filter ribbonjof Ineans for adjusting the application of a die wheel vona comparatively long radius to secure more accurate'variations of adjustments to enable the machine to produce compressions or indentationsin the ribbonwhich shall be uniform in' crosssectional area throughoutxtheir entire length from one edge of the ribbon to, the other;

A further object of the invention is the provision of improved ribbonwinding mechanism i-n combination'with indenting mech anism. L

. Other, objects of the inventionwill appear hereinafter, the novel featuresand combinations being set forth in the appended claim.

In the accompanying drawings- Fig.1 is a side elevation of a filterribbon winding and indenting machine embodying shown in Fig. 1; I

Fig. 3 isa plan view'of the machine shown in Figs. 1 and 2; and

" Fig. 4 illustrates a fragmentary portion of the filter ribbon with the spaced-apart grooves compressed or indented therein.

In Fig. 1,' I have shown two standards 5 and 6 securely mounted on a bed plate 7 [at I one side thereof. As shown in the plan view in Fig. 3, two addition'alstandards 8 and 9 are mounted onthe bed plate 7111i the other side thereof. The standards 5, 6 8' and 9 support the apparatus for winding and un- V windingthe tape andalso the'apparatus for indenting the tape or ribbon with the desired spaced-apart cross-channels or grooves.

- At the top of the standard dismounted a flat disc reel 10 for 'carryingon a drum 11, the copper ribbon or tape 1-2, both surfaces of which are smooth. The drum 11 may be held inv place by-thethumb nut 13 on the screw-threaded shaft 14 which is secured to the enlarged shaft 15 mounted in the bearing block 16. A capbearing 17 is mounted above 50 the lower. bearingblock 16 at the top of the standard 5. 1 As shown in Figs. 1 and '2, spaces are left on both sides of the cap 17 above the bearing I block 1'6'so thatsprings 18, 18 may be relied 55 on to resiliently hold the bearing cap 17 I against the shaft 15. The springs 18 envcircle the adjusting. cap screws 19; 19 which extend loosely through openings in theoap 17 and arescrewsthreaded into openings info theupper surfaces of the bearing block 16.

End flanges 2O, 21 may be provided'to prevent the shaft 15 from moving endwise relatively to the standard5. It will thus be seen that the disc reel 10 with the'convolutions-of W5 the ribbon12 thereon may be mounted on-top of the sta'ndard5 to pay out the ribbon 12 *in the direction indicated by the arrow 22in Fig. 1. k The unreeling tension may be regul'ated by means of the cap screws 19,19. v Secured to the top. of the standard 6 is a cap plate-23 on which is rotatably mounted ,the grooved pulley 24 for receiving and di- .recting downwardly the tape 12, asindi'cated by the arrow-25 in Fig. 1. The pulley 24385 is an idler for'the purpose of changing the direction of'the ribbon 12 when it'is un- -wound or paid out from'the-wound up disc form shown inFig. 1 on the reellOL' From e idler-.24 the ribbon 12 extends to downwardly over a portion of the circumfer- I ential surface of the base wheel 26, the cylindrical peripheral surface of which is smooth and parallel to its axisof'rotation. Atthe lateral edges of this cylindrical surface of the base "wheel flanges are provided correspondingto those of the idler pulley 24 so that the ribbon or tape 12 is 'in reality directed from the grooved pulley 24 to the base wheel 26. g I

The tape or ribbon 12 extends from the base wheel 26 to the winding reel 27 in the direction indicated by the arrow 28. The innor end of the wound up disc of rib-bon on the reel 10 is secured to the drum 11 as indicated at 29 in Fig.1, and the other end of the ribbon 12 is secured at 30 to the drum 31 on the reel 27. The drum 31 may be secured to the reel 27 by means of a cap screw 32 on the screwthreaded shaft 33. The shaft 33 is mounted in a bearing in the standardh and extends through the latter to the friction clutch 34, as shown in Fig. 2. This friction clutch comprises one element 35 connected rigidly to the shaft 33 and another element 36 which is connected rigidly to the cross-shaft 37 mounted in a bearing in the standard 9.

Springs 38 may be relied on to urge the friction transmission pins 39 through openings in-the disc 36 against the opposing fiat face ,of the disc 35 to transmit power to the latter.

The source of. power for the winding apparatus may be connectedto a driven shaft 40 which is mounted in hearings in the standards 6 and 9. This shaft 40 adjacentthe standard 6 has secured thereto the grooved base wheel 26 and at the other end of the shaft 40 is mounted the belting indicated at 42 connectedto the shaft 37. 'Iherefore when the driven shaft 40 is rotated, power is transmitted to the friction clutch 34 to effect winding of the reel 27 in a clockwise direction, as

viewed in Fig. 1, when the shaft 40 is turned in a clockwise direction.

The sprocket gearing 42 comprises a larger sprocket wheel on the shaft 40 than the sprocket wheel on the shaft 37. -Therefore, when the ribbon is first wound on the small drum 31, the reel 27 may be rotated with sufficient speed to keep the ribbon 12 taut along the portion indicated by the arrow 28. As the indented ribbon is wound on the reel 27 and the disc of filter ribbon becomes larger and larger, the tendency would be for the enwound very tightly. and compactly over its entire area extending from the drum 31 to the periphery of the disc element with the result 7 that the porosity of the completed filter will b; uniform throughout the entire area there- 0 1 Connected to the driven shaft 40 by means of the gears 43 and 44 is a die wheel 45, the

peripheral cylindrical surface of which is transverse grooves or channels 48 produced by the transverse bars or ribs 47 of the die wheel. The indentations 48 shown in Fig. 4

are spaced apart to correspond with the spacing apart of the cross-bars 47 of the die wheel, thus producing the spaced-apart cross-bars or cross-ribs 49 on one surface of the ribbon or tape.

The ribbon or tape 12 may be of thin metal, such as copper or other metal of sufiicient strength to permit tight winding without undue distortion, compression or stretching. The cross-ribs or cross-bars or barriers 49 of Fig. 4 are integral with the body of the ribbon or tape being formed by compressing the metal or indenting it, as illustrated at 48, into spaced-apart channel grooves 0r indentations. 'While copper is preferable as the material for the ribbon or tape, it may be of other material according to the nature of the 1 liquid to be filtered; for instance, it may be made of tantalumwhicliis very effective in resisting corrosion. By referring to Fig. 1 it will be seen that the fiat face of the tape or ribbon is inward as it is wound tightly over I the outer face having the cross-bars 49. It is preferable to have the cross-bars 49 wider than thechannels 48 so that when the ribbed ribbon is wound tightly and compactly on the reel 27, the cross-bars 49 will not bend the backs of the grooves 48 on the adjacent convolutions.

The thickness of the metal ribbon or tape and the depth of the grooves or transverse channels may be varied according to conditions and the nature of the liquid to befiltered. Ithas been. found practicable to filter lubricating oil for Diesel engines to use copper ribbons ,three-eighths of an inch in width and thirty-six ten-thousandths of an inch in thickness with the cross-ribs thereon four ten-thousandths of an inch thick and spaced-apart to form grooves or channels four ten-thousandths of an inch in depth and one-sixteenth of an inch in width, leaving the cross-ribs approximately one-eighth of an inch in width. I do not wish to be limited to these particular dimensions, however, as they are specified merely to illustrate the fact that the porous metal disc formed by winding onto the reel 27 is intended to have such minute passageways or pores between the flat faces of the disc as to re quire hydraulic pressure to effect flow of oil from the entrance side to the discharge side of the filter disc element when mounted in filtering apparatus.

The ribbon or ta e being of thin metal is wound in substantially concentric layers to form a disc filter element by means of one length of tape or ribbon. The uniformly spaced cross-bars or cross-ribs or abutments form direct tubular assages or pores for the oil to filter throug from one side of the filter element to the other. The laminations are spaced by means of the separators or bar riers 49 which form the cross-bars or abut- ,ments and these in turn co-act'withythe the filter element may be uniform over itsentire area, the

cross-channels or grooves 48 should be uniform in cross-sectional area from one edge of the ribbon to the other. It is therefore im: portant to provide means for accurately adjusting the spacing of the die wheelfrom the base Wheel and the inclination of the axis of the die wheel relative to the axis of the base wheel. For this purpose I have mounted the shaft 41 carrying the die wheel 45 in sliding bearing blocks "50 and v 51. The bearing block 50 is mounted in suitable guideways 1n the upper portion of the standard 6 and on the under sideof the cap plate 23. In a similar manner the bearing block 51 is mounted to have a horizontal sliding movement in suitable guideways at the upper portion of the standard 9 and on the under side of the cap plate 52. By means of an adjusting screw 53 in the upper side of the standard 6 the bearing block 50 may be pushedto the I left, as shown in Fig. 1, against the action of the restoring spring 54 shown in Fig. 3. By means of this adjustment the distance between the die wheel 45 and the base wheel 26 maybe accurately adjusted according to the thickness of the tape. The distance between the die wheel and the base wheel 26 should be such that when the cross-bars 47 of the die wheel engage the surface of the tape the cross-bars formed on the tape will be at the bottom of the channels 46 of the die wheel. The dimensions are very small and'therefore the screw threads on the adjusting screw 53 should be large in number for a given length The adjustment for the inclination of the axis of the die wheel is preferably located at a distancefrom the die wheel equal to many, times the width of the die wheel. The shaft indented by the die wheel. v

be seen that when the bearing block 51 is moved in one direction orthe other it is vary- 41 is therefore extended to the/other side of the bed plate?" into the bearing block 51 and the adjusting screw .55 appliedto the latter as shown inzFig. 3. An abutment screw is shown at 56 for moving the bearing block 51 to the right, as viewed in Fig. 3, when the screw 55 is retracted.v .When the screw 56 is moved to the'left the screw 55 may be used :to-move the bearing block 51 to the left.

While'a spring similar to that shown at 54 may be used atr56, Ipreferto employ an abutment screw so that after. the adjustment I .in inclination is made the bearing block 51 may be positively held in ad'justed position, thereby preventing vibrations which may occur on' account of slight irregularities in the thickness ofthe tape while it is being It can readily ing the inclination of the die wheel 45 on a long radiusand consequently the die wheel cross-bars may be accurately located with respect to the base wheel so that the grooves or channels indented into the tape may be uniform incross-sectional area from one edge of the tape to the other. 7 While the die wheel 45 fits into the base wheel 26 between the spaced-apart peripheral flanges thereof, adjustment in; inclination of the die wheel can neverthelessbe made, because the necessary adjustments will, always'be comparatively small. 'It is highly desirable, however,

to secure very accurate and exact'adjustments so that when the indented ribbon is wound with a uniform tension, as above explained,

the porosity of the completed disc filter ele- I ment will be uniform over the entire area. In this way the efliciency of'the disc filter element is maintained and increased because Y of the assurance that the passageways or pores will be open from the entrance side to the discharge side of the disc with uniform cross-sectional area andas large a cross-sectional area of-each pore within the limits of 1 the type of filter requiringhydraulic pressure for its operation.

Obviously those skilled in the art may make various changes in the details and arrangement of parts without departing from f the spirit and scope of the invention as defined by the "claim hereto appended and I wish therefore not to be restricted to the precise construction herein'disclosedL Having thus fully disclosed an embodi ment of my invention, what I desire to secure by Letters Patent of the United'states is:

In a machine for making filter ribbon, the combination of a pair of associated indented wheels having interengaging driving means, one of said .wheels comprising a die wheel and having ribbon indenting means formed on its periphery for indentinga surface of the ribbon to form spaced apart grooves extendinglaterally across the ribbonbetween 'its opposed side edges, the other of said f wheels comprising a, roller for pressing the ribbon against the indenting means of the die Wheel, an unwinding reel adapted to hold a, coil of relatively thin metal ribbon, a winding reel upon which the ribbon is received after passing the indenting Wheels, drlvlng means for drlving the Winding reel and the indenting wheels, said driving means includlng means for maintaining the ribbon under uniform tension during the indenting and winding operation.

In testimony whereof I have signed my name to this specification on this 19 day of October A. D. 1928;

' PAUL B. RENFREW. 

